For some reason, the Java code I'm working on crashes, as a class tries to find itself. Line 43 of AIDriver.java defines a RayCastCallback, and this for some reason causes a class loader to search for "uk.co.samatkins.racing.drivers.AIDriver$MoveCalculator$1", which I think is the RayCastCallback itself. Any ideas?

AIDriver.java

package uk.co.samatkins.racing.drivers;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.physics.box2d.Fixture;
import com.badlogic.gdx.physics.box2d.RayCastCallback;
import com.badlogic.gdx.physics.box2d.World;

import uk.co.samatkins.racing.Car;
import uk.co.samatkins.racing.Move;


public class AIDriver extends AbstractDriver {

  @Override
	public void calculateMove() {
		this.ready = false;
		// Start a thread for calculating the next move
		
//		Thread aiThread = new Thread(new MoveCalculator(this), "AI Thread");
//		aiThread.start();
		MoveCalculator mc = new MoveCalculator(this);
		mc.run();
	}
	
	/**
	 * Class that calculates the next move for the AI.
	 * @author Sam
	 */
	public class MoveCalculator implements Runnable {
		private AIDriver aiDriver;

		public MoveCalculator(AIDriver aiDriver) {
			this.aiDriver = aiDriver;
		}

		@Override
		public void run() {
			
			// Cast a ray forwards from the car
			Car car = this.aiDriver.car;
			World world = car.getWorld();
			RayCastCallback cb = new RayCastCallback() {
				
				@Override
				public float reportRayFixture(Fixture fixture, Vector2 point,
						Vector2 normal, float fraction) {
					Gdx.app.debug("RAYCAST", "fixture: " + fixture + " point: " + point + " normal: " + normal + " fraction: " + fraction);
					return 0;
				}
			};
			Vector2 pos = car.getPosition().cpy();
			Vector2 pos2 = pos.cpy().add(car.getVelocity());
			world.rayCast(cb, pos, pos2);
			
			this.aiDriver.currentMove = new Move(0,1.0f,0);
			this.aiDriver.ready = true;
		}
		
	}
}

Stack Trace

Thread [LWJGL Application] (Suspended)  
	owns: Launcher$ExtClassLoader  (id=50)	
	owns: Launcher$AppClassLoader  (id=51)	
	owns: LwjglInput  (id=30)	
	ClassNotFoundException(Throwable).<init>(String, Throwable) line: 217	
	ClassNotFoundException(Exception).<init>(String, Throwable) line: not available	
	ClassNotFoundException.<init>(String) line: not available	
	URLClassLoader$1.run() line: not available [local variables unavailable]	
	AccessController.doPrivileged(PrivilegedExceptionAction<T>, AccessControlContext) line: not available [native method]	
	Launcher$ExtClassLoader(URLClassLoader).findClass(String) line: not available	
	Launcher$ExtClassLoader.findClass(String) line: not available	
	Launcher$ExtClassLoader(ClassLoader).loadClass(String, boolean) line: not available	
	Launcher$AppClassLoader(ClassLoader).loadClass(String, boolean) line: not available	
	Launcher$AppClassLoader.loadClass(String, boolean) line: not available	
	Launcher$AppClassLoader(ClassLoader).loadClass(String) line: not available	
	AIDriver$MoveCalculator.run() line: 43	
	AIDriver.calculateMove() line: 23	
	PlayScene.startControl() line: 281	
	PlayScene.show() line: 151	
	Game(Game).setScreen(Screen) line: 62	
	MenuScene$1.clicked(InputEvent, float, float) line: 33	
	MenuScene$1(ClickListener).touchUp(InputEvent, float, float, int, int) line: 78	
	MenuScene$1(InputListener).handle(Event) line: 43	
	MenuScene(Stage).touchUp(int, int, int, int) line: 309	
	InputMultiplexer.touchUp(int, int, int, int) line: 94	
	LwjglInput.processEvents() line: 297	
	LwjglApplication.mainLoop() line: 183	
	LwjglApplication$1.run() line: 110